News Summary: Wal-Mart plans stock buybacks

FAYETTEVILLE, Ark. (AP) -- ATTENTION WAL-MART INVESTORS: Wal-Mart will repurchase up to $15 billion of its shares.

MEXICO MESS: The program comes as Wal-Mart encounters concerns over how it handled bribery allegations that surfaced last year at its Mexican unit.

OVERSEAS OVERSIGHT: Wal-Mart is taking steps to improve monitoring of its overseas business practices following a building collapse in April in Bangladesh that killed more than 1,100 garment workers.